Working with colleagues isn't always easy. They're not always team players, and a few can even be bullies. It's important when you encounter someone like this that you step back and try to see the world from their point of view. Don't automatically jump to the conclusion that “they're jerks” and you cannot work with them. It will help if you can understand their priorities and, especially, the pressures on them. That insight can then guide the way you approach them and what you propose.
